params-trailing-comma-single.js (2206B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/function-forms/params-trailing-comma-single.case 4 // - src/function-forms/default/cls-decl-async-gen-meth-static.template 5 /*--- 6 description: A trailing comma should not increase the respective length, using a single parameter (static class declaration async generator method) 7 esid: sec-runtime-semantics-bindingclassdeclarationevaluation 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 ClassDeclaration : class BindingIdentifier ClassTail 12 13 1. Let className be StringValue of BindingIdentifier. 14 2. Let value be the result of ClassDefinitionEvaluation of ClassTail with 15 argument className. 16 [...] 17 18 14.5.14 Runtime Semantics: ClassDefinitionEvaluation 19 20 21. For each ClassElement m in order from methods 21 a. If IsStatic of m is false, then 22 b. Else, 23 Let status be the result of performing PropertyDefinitionEvaluation for 24 m with arguments F and false. 25 [...] 26 27 Runtime Semantics: PropertyDefinitionEvaluation 28 29 AsyncGeneratorMethod : 30 async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) 31 { AsyncGeneratorBody } 32 33 1. Let propKey be the result of evaluating PropertyName. 34 2. ReturnIfAbrupt(propKey). 35 3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true. 36 Otherwise let strict be false. 37 4. Let scope be the running execution context's LexicalEnvironment. 38 5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters, 39 AsyncGeneratorBody, scope, strict). 40 [...] 41 42 43 Trailing comma in the parameters list 44 45 14.1 Function Definitions 46 47 FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] , 48 ---*/ 49 50 51 var callCount = 0; 52 class C { 53 static async *method(a,) { 54 assert.sameValue(a, 42); 55 callCount = callCount + 1; 56 } 57 } 58 59 // Stores a reference `ref` for case evaluation 60 var ref = C.method; 61 62 ref(42, 39).next().then(() => { 63 assert.sameValue(callCount, 1, 'method invoked exactly once'); 64 }).then($DONE, $DONE); 65 66 assert.sameValue(ref.length, 1, 'length is properly set');